Ho can I divide unsigned types with numeric places? ```val value: UInt = 137 println("Value: ${value...

# android

[Lilly]

Ho can I divide unsigned types with numeric places?

val value: UInt = 137
println("Value: ${value / 10F}") // Does not work

I can't find any hint how to the division. The result should be 13.7

[ephemient]

on JVM you can

value.toLong().toBigDecimal().scaleByPowerOfTen(-1)

but there is no kotlin-stdlib functionality

[ephemient]

that being said, the full range of UInt is exactly representable as Double, so value.toDouble() / 10.0 should format to more-or-less the same

[Lilly]

value.toDouble() / 10.0

Good point, thanks!

[CLOVIS]

Although you'll lose precision, as always with float operations (so if it's important that the number is exact, don't use that)

[ephemient]

(UInt.MAX_VALUE.toDouble() / 10.0).ulp ≈ 2.9802322387695312E-8 (2^-25) so there is definitely enough precision for one decimal point

[ephemient]

so yes, you do need to be careful with floating point precision in general, but in this particular case, it is enough for printing

[ephemient]

although you will run into the challenge that 429496729.5.toString() will be in scientific notation by default (on JVM), and there's no platform-independent way to control numeric formatting in Kotlin